---
title: "Big Rig Smog — Clean Truck Check, Simi Valley, CA"
description: "Big Rig Smog in Simi Valley, CA is on CARB's Clean Truck Check tester list. Offers mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome…"
url: "https://ctcfinder.com/tester/big-rig-smog-simi-valley/"
updated: "2026-11-01"
publisher: "CTC Finder (independent directory, not affiliated with CARB)"
---

# Big Rig Smog

Clean Truck Check tester in Simi Valley, CA (Ventura County).

> CTC Finder is an independent directory, not affiliated with CARB. Tester data: CARB Clean Truck Check public tester list, last checked November 1, 2026. Confirm services, hours and prices with the tester.

| Field | Value |
|---|---|
| Location | 4212 E Los Angeles Ave, Simi Valley, CA 93063 |
| County | Ventura County |
| Phone | (805) 638-3911 |
| Mobile testing | Yes |
| OBD testing | Yes |
| Smoke opacity (non-OBD) | Yes |
| Motorhomes | Yes |
| Credentialed testers | 1 |
| Last verified | 2026-11-01 |

## Which trucks Big Rig Smog can test

| Your vehicle | Test required | This tester |
|---|---|---|
| Diesel, model year 2013 or newer | OBD scan | Yes |
| Alternative fuel (natural gas, propane), 2018 or newer | OBD scan | Yes |
| Diesel, model year 2012 or older (no OBD) | Smoke opacity test (SAE J1667) plus visual inspection | Yes |
| California-registered motorhome | Same test as above by engine year, once a year | Yes |

## Clean Truck Check testers in Ventura County

Big Rig Smog is one of 68 testing businesses in Ventura County on CARB's public tester list. 61 of them offer mobile testing and 21 do smoke opacity tests. In Simi Valley itself there are 8 listed businesses, 8 of them mobile.

## When your truck is due

Most trucks test twice a year, on a schedule tied to the DMV registration expiration date. CARB says OBD trucks move to four tests a year beginning October 2027. California-registered (non-commercial) motorhomes and agricultural vehicles test once a year. See the [deadline guide](https://ctcfinder.com/guide/deadlines-2026-2027/). You can test up to 90 days before a deadline. Free email reminders: https://ctcfinder.com/reminders/

## Frequently asked questions

### Does Big Rig Smog offer mobile Clean Truck Check testing?

Yes. Big Rig Smog says on CARB's tester list that it offers mobile testing, so it can come to your yard or job site. Ask about a trip fee when you call.

### Can Big Rig Smog test a 2012 or older diesel truck?

Yes. Big Rig Smog lists smoke opacity testing, the test CARB requires for diesel trucks of model year 2012 and older (no OBD). See [OBD vs smoke opacity](https://ctcfinder.com/guide/obd-vs-smoke-opacity-test/).

### How much does Big Rig Smog charge for a Clean Truck Check?

Big Rig Smog has not published prices with us; call (805) 638-3911 for a quote. Published California prices are usually $50–$135 per vehicle for an OBD test and $190–$200 for a smoke opacity test, plus CARB's annual fee ($32.13 in 2026). See the [cost guide](https://ctcfinder.com/guide/cost/).

### Is Big Rig Smog a CARB-credentialed tester?

Big Rig Smog appears on CARB's public Clean Truck Check tester list, last checked November 1, 2026. Only credentialed testers can submit results to CARB; after the test, confirm the passing result shows for your vehicle in CTC-VIS.

## Other testers nearby

- **[IM Clean Truck Check](https://ctcfinder.com/tester/im-clean-truck-check-simi-valley/)** — 4892 Borders St, Simi Valley, CA 93063 — (805) 823-9749 — 1 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Chatsworth Smog Check](https://ctcfinder.com/tester/chatsworth-smog-check-chatsworth/)** — 10034 Canoga Ave, Chatsworth, CA 91311 — (818) 489-9491 — 5 mi. Services: OBD testing, motorhome testing.
- **[EcoTechWorld Inc](https://ctcfinder.com/tester/ecotechworld-inc-chatsworth/)** — 21356 Nordhoff St Suite 110, Chatsworth, CA 91311 — (323) 633-5490 — 5 mi. Services: mobile testing, OBD testing.
- **[Prodigal Daughters Holding](https://ctcfinder.com/tester/prodigal-daughters-holding-chatsworth/)** — Chatsworth, CA 91311 — (760) 810-2656 — 5 mi. Services: mobile testing, OBD testing, smoke opacity (non-OBD) testing, motorhome testing.
- **[Woodys Automotive](https://ctcfinder.com/tester/woodys-automotive-chatsworth/)** — 21800 Lassen St Suite C, Chatsworth, CA 91311 — (323) 353-3797 — 5 mi. Services: mobile testing, OBD testing, motorhome testing.
- **[A1 Emissions](https://ctcfinder.com/tester/a1-emissions-simi-valley/)** — 1933 3rd St, Simi Valley, CA 93065 — (805) 857-1085 — 6 mi. Services: mobile testing, OBD testing, motorhome testing.